Fix SC2129

Signed-off-by: Rosen Penev <rosenp@gmail.com>

This replaces the use of uci_validate_section() with
uci_load_validate(), which removes the need to declare local variables
for every config option.

This also removes some unnecessary curly brackets.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

added option DatabaseDirectory
update depends on musl-fts libraries

Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>